2x17mm pulley (Orange) wheel (2 Pack)

Pulleys are used to connect different moving parts of a system to each other with the use of an elastic band or some form of a belt. These small pulleys are ideal to be used in small models of a large scale project to test the application of your idea. They are also used on most kids projects that has some form of a gear box or that has many moving parts This makes it ideal to be used as an add on to the project, or t0 be used as replacement parts on a kit if you lost some of the pulleys.